Fix Spinach and Capybara dependencies

Closes #30347

features/support/capybara.rb

-require 'spinach/capybara'
 require 'capybara/poltergeist'
 require 'capybara-screenshot/spinach'

features/support/env.rb

@@ -4,8 +4,7 @@ SimpleCovEnv.start!
 ENV['RAILS_ENV'] = 'test'
 require './config/environment'
 require 'rspec/expectations'
-
-require_relative 'capybara'
+require 'spinach-rails'
 require_relative 'db_cleaner'
 require_relative 'rerun'